lionfish cloudy eyes and dark color

[joshallen]

I have a 55g tank with 50lbs. of live rock. it has a volitian Lionfish, Singapore Angel, Yellow Tang and a Rabbitfish. This morning my lionfish's eyes looked cloudy and he was a lot darker in color. yesterday I did a 10g water change and added six new hermit crabs. Up until now I've had no problems with this fish but I'm wondering what caused this and how to fix it. My Angelfish has an infected fin and Yesterday my LFS suggested putting Marine Max in the tank to try and treat that I'm wondering if this could have affected the lionfish. Is there anything I need to do to help my fish get better? :help:

 

[beth]

josh, your tank is seriously overcrowded, and does not really have the best mix of fish if you are going for a community environment.
List your water readings and what are you feeding the lion?